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Protocol ID
Devilsbane
Darril's book makes a huge point to make it clear that a protocol ID is not a port number. But it hasn't gone into detail about what it is or how it is different. Does anyone know the answer to this?
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earweed
It's very doubtful you'll have to know anything about protocol ID for the test. It's just a number to represent what the protocol is. These are necessary since there are so many protocols out there. Knowing the common port numbers you are only exposed to a small number of protocols but the number of them is huge, a lot of proprietary protocols.
It basically specifies the protocol type as shown here
TCP / IP Suite |ATMP | L2F | L2TP | PPTP | DHCP | DVMRP | ICMP | ICMPv6 | Protocol |
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